.page-about {
  --about-orange-deep: #C6481D;
  --about-cyan-deep: #0A5F7A;
  --about-text-soft: #B8C4D6;
  --about-grid: 4.5rem;

  background-color: var(--c-bg);
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.04) 1px, transparent 1px);
  background-size: var(--about-grid) var(--about-grid);
  position: relative;
}

.page-about .container {
  max-width: var(--container);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .about-section-head {
  margin-bottom: 2rem;
}

.page-about .about-section-head__index {
  color: var(--c-cyan);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  margin-bottom: 0.6rem;
}

.page-about .about-section-head__title {
  color: var(--c-paper);
  font-family: var(--font-head);
  font-size: clamp(1.875rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0;
  padding-left: 1.25rem;
  position: relative;
}

.page-about .about-section-head__title::before {
  background: var(--c-accent);
  bottom: 0.12em;
  clip-path: polygon(0 0, 100% 0, 60% 100%, 0 100%);
  content: '';
  left: 0;
  position: absolute;
  top: 0.12em;
  width: 0.375rem;
}

/* ------- Hero ------- */
.page-about .about-hero {
  overflow: hidden;
  padding: 1.5rem 0 4.5rem;
  position: relative;
}

.page-about .about-hero::after {
  background: radial-gradient(circle, rgba(255, 107, 53, 0.12), transparent 65%);
  content: '';
  height: 22rem;
  pointer-events: none;
  position: absolute;
  right: -8rem;
  top: -4rem;
  width: 22rem;
}

.page-about .about-hero__inner {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
  padding-top: 2.75rem;
}

.page-about .about-hero__rail {
  display: none;
}

.page-about .about-hero__content {
  max-width: 48rem;
  position: relative;
  z-index: 1;
}

.page-about .about-hero__kicker {
  color: var(--c-cyan);
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  margin-bottom: 1rem;
}

.page-about .about-hero__title {
  color: var(--c-paper);
  font-family: var(--font-head);
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin: 0 0 1.5rem;
  text-transform: uppercase;
}

.page-about .about-hero__title-accent {
  background: linear-gradient(90deg, var(--c-cyan), #7adfff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-hero__sub {
  color: var(--c-muted);
  font-size: 1rem;
  line-height: 1.8;
  margin: 0;
  max-width: 34rem;
}

.page-about .about-hero__facts {
  border-top: 3px solid var(--c-accent);
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 2.5rem;
  margin-top: 1.5rem;
  max-width: 34rem;
  padding-top: 1.25rem;
}

.page-about .about-hero__fact {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.page-about .about-hero__fact dt {
  color: var(--c-muted);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.page-about .about-hero__fact dd {
  color: var(--c-paper);
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0;
}

/* ------- Origin ------- */
.page-about .about-origin,
.page-about .about-milestone {
  padding: 4rem 0;
}

.page-about .about-origin__inner {
  display: grid;
  gap: 3rem;
  grid-template-columns: 1fr;
}

.page-about .about-origin__lead {
  color: var(--c-paper);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.6;
  margin: 0 0 1rem;
}

.page-about .about-origin__body {
  color: var(--c-muted);
  font-size: 0.9375rem;
  line-height: 1.8;
  margin: 0;
  max-width: 36rem;
}

.page-about .about-origin__points {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
}

.page-about .about-origin__points li {
  border-bottom: 1px dashed rgba(0, 229, 255, 0.2);
  color: var(--c-paper);
  display: flex;
  font-size: 0.9375rem;
  gap: 0.75rem;
  padding: 0.65rem 0;
}

.page-about .about-origin__points li::before {
  background: linear-gradient(90deg, var(--c-accent), var(--c-cyan));
  clip-path: polygon(0 0, 100% 0, 70% 100%, 0 100%);
  content: '';
  flex: 0 0 auto;
  height: 0.5rem;
  margin-top: 0.5rem;
  width: 1.25rem;
}

.page-about .about-origin__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.page-about .about-origin__aside {
  align-items: center;
  display: flex;
  justify-content: center;
}

.page-about .about-origin__ring {
  aspect-ratio: 1;
  display: block;
  height: auto;
  margin-inline: auto;
  max-width: 18rem;
  width: 100%;
}

.page-about .about-origin__ring-track {
  stroke: rgba(0, 229, 255, 0.18);
}

.page-about .about-origin__ring-progress {
  stroke: var(--c-accent);
}

/* ------- Milestone Timeline ------- */
.page-about .about-milestone {
  position: relative;
}

.page-about .about-timeline__track {
  margin-top: 2.5rem;
  max-width: 52rem;
  position: relative;
}

.page-about .about-timeline__line {
  background: linear-gradient(180deg, var(--c-accent) 0%, var(--c-cyan) 30%, var(--c-cyan) 70%, rgba(0, 229, 255, 0.15) 100%);
  bottom: 0.375rem;
  left: 0.5625rem;
  position: absolute;
  top: 0.375rem;
  width: 0.125rem;
  z-index: 0;
}

.page-about .timeline-node {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1.25rem minmax(0, 1fr);
  margin-bottom: 2.25rem;
  position: relative;
  z-index: 1;
}

.page-about .timeline-node:last-child {
  margin-bottom: 0;
}

.page-about .timeline-node__marker {
  background: var(--c-bg);
  border: 3px solid var(--c-cyan);
  box-sizing: border-box;
  height: 0.875rem;
  justify-self: center;
  margin-top: 0.75rem;
  transform: rotate(45deg);
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
  width: 0.875rem;
}

.page-about .timeline-node:hover .timeline-node__marker {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  box-shadow: 0 0 0 0.45rem rgba(0, 229, 255, 0.15);
}

.page-about .timeline-node__panel {
  background: rgba(30, 58, 95, 0.72);
  border: 1px solid rgba(0, 229, 255, 0.12);
  padding: 1.5rem;
  position: relative;
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}

.page-about .timeline-node__panel::after {
  border-color: transparent transparent var(--c-bg) transparent;
  border-style: solid;
  border-width: 0 0 1.5rem 1.5rem;
  bottom: 0;
  content: '';
  position: absolute;
  right: 0;
}

.page-about .timeline-node:hover .timeline-node__panel {
  background: var(--c-bg-alt);
  border-color: rgba(0, 229, 255, 0.4);
  transform: translateY(-0.25rem);
}

.page-about .timeline-node__year {
  color: var(--c-accent);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.page-about .timeline-node__title {
  color: var(--c-paper);
  font-family: var(--font-head);
  font-size: 1.375rem;
  font-weight: 800;
  margin: 0 0 0.75rem;
}

.page-about .timeline-node__desc {
  color: var(--about-text-soft);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-bottom: 1rem;
}

.page-about .timeline-node__data {
  border-top: 1px dashed rgba(0, 229, 255, 0.2);
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 1rem 0 0;
}

.page-about .timeline-node__data li {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.page-about .timeline-node__data span {
  color: var(--c-muted);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.page-about .timeline-node__data strong {
  color: var(--c-cyan);
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 600;
}

.page-about .about-milestone__chart {
  margin: 3rem 0 0;
  max-width: 40rem;
}

.page-about .about-milestone__chart img {
  clip-path: polygon(0 0, calc(100% - 2rem) 0, 100% 2rem, 100% 100%, 0 100%);
  display: block;
  width: 100%;
}

.page-about .about-milestone__chart figcaption {
  border-left: 3px solid var(--c-accent);
  color: var(--c-muted);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.05em;
  margin-top: 0.75rem;
  padding-left: 1rem;
}

/* ------- Data Section ------- */
.page-about .about-data {
  padding: 2rem 0 4rem;
}

.page-about .about-data__inner {
  align-items: center;
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
}

.page-about .about-data__panel {
  background: var(--c-paper);
  clip-path: polygon(0 0, calc(100% - 2.5rem) 0, 100% 2.5rem, 100% 100%, 0 100%);
  padding: 2rem;
  position: relative;
}

.page-about .about-data .about-section-head__index {
  color: var(--about-cyan-deep);
}

.page-about .about-data .about-section-head__title {
  color: var(--c-ink);
}

.page-about .about-data__lead {
  color: rgba(26, 26, 26, 0.82);
  font-size: 1rem;
  line-height: 1.8;
  margin: 0 0 1.5rem;
  max-width: 38rem;
}

.page-about .about-data__list {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
}

.page-about .about-data__list li {
  color: rgba(26, 26, 26, 0.82);
  font-size: 0.9375rem;
  line-height: 1.6;
  margin-bottom: 0.75rem;
  padding-left: 1.5rem;
  position: relative;
}

.page-about .about-data__list li::before {
  background: var(--about-orange-deep);
  content: '';
  height: 0.125rem;
  left: 0;
  position: absolute;
  top: 0.7em;
  width: 0.5rem;
}

.page-about .about-data__stats {
  border-top: 1px solid rgba(26, 26, 26, 0.15);
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 1.25rem;
  padding-top: 1.5rem;
}

.page-about .about-data__stat {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.page-about .about-data__stat-value {
  color: var(--about-orange-deep);
  font-size: clamp(1.25rem, 3vw, 2rem);
  font-weight: 700;
}

.page-about .about-data__stat-label {
  color: rgba(26, 26, 26, 0.65);
  font-size: 0.75rem;
}

.page-about .about-data__figure {
  margin: 0;
  max-width: 31.25rem;
}

.page-about .about-data__figure img {
  clip-path: polygon(0 2.5rem, 2.5rem 0, 100% 0, 100% calc(100% - 2.5rem), calc(100% - 2.5rem) 100%, 0 100%);
  display: block;
  width: 100%;
}

/* ------- Tech Section ------- */
.page-about .about-tech {
  padding: 4rem 0 3rem;
}

.page-about .about-tech__lead,
.page-about .about-service__lead {
  color: var(--c-muted);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 2rem;
  max-width: 42rem;
}

.page-about .about-tech__cards {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

.page-about .about-tech-card {
  background: var(--c-bg-alt);
  clip-path: polygon(0 0, calc(100% - 1.5rem) 0, 100% 1.5rem, 100% 100%, 1.5rem 100%, 0 calc(100% - 1.5rem));
  padding: 2rem 1.75rem;
  position: relative;
  transition: transform var(--transition), background var(--transition);
}

.page-about .about-tech-card::before {
  background: var(--c-accent);
  clip-path: polygon(0 0, 100% 0, 75% 100%, 0 100%);
  content: '';
  height: 0.375rem;
  left: 1.75rem;
  position: absolute;
  top: 0;
  width: 3rem;
}

.page-about .about-tech-card:hover {
  background: #16335a;
  transform: translateY(-0.25rem);
}

.page-about .about-tech-card__index {
  color: var(--c-accent);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  margin-bottom: 1.5rem;
}

.page-about .about-tech-card__title {
  color: var(--c-paper);
  font-family: var(--font-head);
  font-size: 1.375rem;
  font-weight: 800;
  margin: 0 0 0.75rem;
}

.page-about .about-tech-card__desc {
  color: var(--about-text-soft);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.page-about .about-tech-card__meta {
  border-top: 1px dashed rgba(0, 229, 255, 0.2);
  color: var(--c-cyan);
  font-size: 0.8125rem;
  padding-top: 0.875rem;
}

/* ------- Service Section ------- */
.page-about .about-service {
  padding: 3rem 0 5rem;
}

.page-about .about-service__figure-wrap {
  margin: 0 0 3rem;
  max-width: 62.5rem;
}

.page-about .about-service__figure {
  margin: 0;
}

.page-about .about-service__figure img {
  clip-path: polygon(0 0, calc(100% - 2rem) 0, 100% 2rem, 100% 100%, 2rem 100%, 0 calc(100% - 2rem));
  display: block;
  width: 100%;
}

.page-about .about-service__grid {
  display: grid;
  gap: 2.5rem;
  grid-template-columns: 1fr;
}

.page-about .about-service__faq-item {
  background: rgba(30, 58, 95, 0.5);
  border: 1px solid rgba(0, 229, 255, 0.18);
  margin-bottom: 0.75rem;
  padding: 0 1.25rem;
}

.page-about .about-service__faq-item[open] {
  border-color: rgba(0, 229, 255, 0.4);
}

.page-about .about-service__faq-item summary {
  color: var(--c-paper);
  cursor: pointer;
  font-family: var(--font-head);
  font-size: 0.9375rem;
  font-weight: 700;
  list-style: none;
  padding: 1rem 0;
  position: relative;
}

.page-about .about-service__faq-item summary::-webkit-details-marker {
  display: none;
}

.page-about .about-service__faq-item summary::after {
  color: var(--c-cyan);
  content: '+';
  font-family: var(--font-mono);
  position: absolute;
  right: 0;
  top: 0.9rem;
}

.page-about .about-service__faq-item[open] summary::after {
  content: '–';
}

.page-about .about-service__faq-item p {
  color: var(--c-muted);
  font-size: 0.9375rem;
  line-height: 1.75;
  margin: 0;
  padding: 0 1.5rem 1.25rem 0;
}

.page-about .about-service__contact {
  background: var(--c-bg-alt);
  border-top: 4px solid var(--c-accent);
  height: fit-content;
  padding: 1.75rem;
}

.page-about .about-service__contact-title {
  color: var(--c-paper);
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 800;
  margin: 0 0 1.25rem;
}

.page-about .about-service__contact-list {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
}

.page-about .about-service__contact-list li {
  border-bottom: 1px solid rgba(0, 229, 255, 0.12);
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.8rem 0;
}

.page-about .about-service__contact-list span {
  color: var(--c-cyan);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
}

.page-about .about-service__contact-list strong {
  color: var(--c-paper);
  font-weight: 600;
  word-break: break-all;
}

.page-about .about-service__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ------- Breakpoints ------- */
@media (min-width: 48rem) {
  .page-about .about-tech__cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .about-tech-card:nth-child(3) {
    grid-column: 1 / -1;
  }
}

@media (min-width: 64rem) {
  .page-about .about-hero__inner {
    align-items: end;
    grid-template-columns: 1.75rem minmax(0, 1fr) 18rem;
    gap: 2.5rem;
  }

  .page-about .about-hero__rail {
    align-items: center;
    align-self: stretch;
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
  }

  .page-about .about-hero__rail-dot {
    background: var(--c-accent);
    height: 0.75rem;
    transform: rotate(45deg);
    width: 0.75rem;
  }

  .page-about .about-hero__rail-line {
    background: linear-gradient(180deg, var(--c-accent), var(--c-cyan));
    flex: 1;
    min-height: 2rem;
    width: 2px;
  }

  .page-about .about-hero__rail-arrow {
    border-left: 0.4rem solid transparent;
    border-right: 0.4rem solid transparent;
    border-bottom: 0.625rem solid var(--c-cyan);
    height: 0;
    width: 0;
  }

  .page-about .about-hero__facts {
    border-left: 3px solid var(--c-accent);
    border-top: none;
    flex-direction: column;
    margin-top: 0;
    padding-top: 0;
    padding-left: 1.5rem;
  }

  .page-about .about-origin__inner {
    align-items: center;
    grid-template-columns: minmax(0, 1fr) 20rem;
    gap: 4rem;
  }

  .page-about .about-origin__ring {
    max-width: 18rem;
  }

  .page-about .about-data__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 3rem;
  }

  .page-about .about-data__panel {
    padding: 3rem;
  }

  .page-about .about-data__figure {
    justify-self: end;
  }

  .page-about .about-tech__cards {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }

  .page-about .about-tech-card:nth-child(3) {
    grid-column: auto;
  }

  .page-about .about-service__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 3rem;
  }

  .page-about .about-service__contact {
    padding: 2rem;
  }
}